My grandson is left handed, I am right handed......somewhat awkward using it left handed....built more for right handed individuals, in my opinion. Plastic caps are appx 1/16 of an inch thick....they do hold, if you can get the staple (3/8) hammered in. Like a right-handed gun.....a left handed individual can shoot it, but comfort comes from using a left handed weapon.....ergonomics.
No, this item only uses plastic.
Thank you for your STINGER question. The Stinger CH38A is for use with Stinger 3/8 in. staplepac only. The staples are designed in a way that allows them to cut through the plastic cap, which ordinary staples do not have. Thank you for viewing this STINGER product! -Team STINGER